A US patent application proposes a combination of a phosphorus flame retardant, silica and organo-titanate compounds to achieve fire performance in thermoplastic polyolefins for data communication cable insulation. The patent application claims that fire and smoke standards NFPA 262, UL 910, UL 1666 and UL 1685 can be achieved.
The titanate was used at <1.5% and silica at 2%, and a number of advantages are claimed. With silica, the titanate acts as a synergist, improving the effectiveness of phosphorus and nitrogen PIN FRs (e.g. ammonium polyphosphate, melamine phosphate) and improving char integrity. It also improves dispersion of the PIN FR in the polymer and enhances melt processing. Previous patent documents also claim that the titanate additives prevent melt dripping in fire.
“Halogen-free flame retardant material for data communication cables”, US patent application 20170029607 published 2/2/2017 http://www.google.com/patents/US20170029607